Hart, C. A. (Clara Avis), b. 1863, Feldman, Daniel D., b. 1872 · New York, American Book Co · leaf 317
Given str. line FB1.AB and to BC at B, and plane MN con-taining AB and BC, To prove FB ± plane MN. < Outline of Proof 1. In plane MN draw AC) through B draw any line, as BE,meeting ^C at -9^ 2. Prolong FB to E so that BE = FB\ draw AF, HF, CF, AE,HE, CE. 3. AB and BC are then X bisectors of FE;…
Geometry, Plane · Geometry, Solid
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